python異常型別列表

1. nameerror：嘗試訪問乙個未申明的變數

>>> v

nameerror: name 'v' is not defined

>>> v = 1/0

zerodivisionerror: int division or modulo by zero

int int

syntaxerror: invalid syntax (, line 1)

list = [2]

>>> list[3]
traceback (most recent call last):
file "", line 1, in list[3]
indexerror: list index out of range

dic = 

>>> dic['3']
traceback (most recent call last):
file "", line 1, in dic['3']
keyerror: '3'

>>> f = open('abc')

ioerror: [errno 2] no such file or directory: 'abc'

>>> class worker:

def work():
print("i am working")
>>> w = worker()
>>> w.a
traceback (most recent call last):
file "", line 1, in w.a
attributeerror: 'worker' object has no attribute 'a'

>>> int('d')

traceback (most recent call last):
file "", line 1, in int('d')
valueerror: invalid literal for int() with base 10: 'd'

>>> istr = '22'

>>> ival = 22
>>> obj = istr + ival;
traceback (most recent call last):
file "", line 1, in obj = istr + ival;
typeerror: can't convert 'int' object to str implicitly

>>> assert 1 != 1

traceback (most recent call last):
file "", line 1, in assert 1 != 1
assertionerror

12. notimplementederror：方法沒實現引起的異常

class base(object):

def __init__(self):
pass
def action(self):
#丟擲異常，說明該介面方法未實現
raise notimplementederror

lookuperror異常是indexerror、keyerror的基類， 如果你不確定資料型別是字典還是列表時，可以用lookuperror捕獲此異常

14. standarderror 標準異常

除stopiteration, generatorexit, keyboardinterrupt 和systemexit外，其他異常都是standarerror的子類。

錯誤檢測與異常處理區別在於：錯誤檢測是在正常的程式流中，處理不可預見問題的**，例如乙個呼叫操作未能成功結束

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